Uncertainties and errors, graphical techniques - class-XI
| Description: uncertainties and errors, graphical techniques | |
| Number of Questions: 45 | |
| Created by: Palash Sundaram | |
| Tags: measurement and data processing and analysis chemistry basic concepts of chemistry some basic concepts of chemistry moles and equations stoichiometry introduction to analytical chemistry |
Given the numbers $786$, $0.786$ and $0.0786$. The number significant figures for the numbers is :
How many significant figures are in $2.0$ cm ?
How many significant figures are present in $7 \times 2.232$?
How many significant digits does the measurement $124.04g$ possess?
How many significant digits does the measurement $0.0384g$ possess?
Which of the following numbers has 1 significant figure?
All of the following are good laboratory practices except_________.
Round 984 liters to 2 significant digits.
The result of the operation 2.5 X 1.25 should be which of the following on the basis of significant figures?
Each side of a cube is measured to be $7.203$ m. What is the volume of the cube to appropriate significant figure?
In which of the following numbers, all zeros are significant?
Non zero digits are always Significant.
Calculate the following with due regard for significant figures:
If repeated measurements give values close to one another, the number is:
The number of significant figures present in $4.50 \times 10^{3} $ is:
The number of significant figures in 0.02300 is ?
significant number in 0.002930
Which of the following values possess maximum number of significent zeros?
After rounding off 1.235 and 1.225, we will have their answers respectively as
Which among the following measurements contains the highest number of significant figures?
The correctly reported answer of the addition of 4.523, 2.3 and 6.24 will have significant figures
314.000 has how many significant figures.
How many significant figures in 0.00025 ?
Number of significant figures in $ 2000\times 10^2$ is ____ .
The number of significant figure in $\pi$ are:
Which of the following has two significant figures?
Which of the following have same significant figures?
Statement I: The number $5,007$ has three significant figures
Because
Statement II: Zeros between non-zero digits are significant
Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$14.5-3.46=$______
Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$2.8\times 8.96 = ? $
How many significant digits does the measurement $0.5873g$ possess?
Two samples were weighed using different balance and the following data were obtained.
Sample #1=3.719 grams
Sample #2=0.42 gram
The total mass of the samples should be reported as :
What is the final significant digit in the measurement of $16.280g$?
Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$\dfrac{12.55}{3.0} =4.18333$
Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$4.51\times{10}^{5}+3.6\times{10}^{3}$
What is the molecular mass of glucose $C _6H _{12}O _6$ molecule up to 6 significant figures?
Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$(1.23\times {10}^{23})\times (3\times{10}^{14})=3.69\times {10}^{37}$
Which of the following is an exact number?
Select the numbers with same significant figures:
In which of the following numbers, all the zeros are insignificant?
Which set of figures will be obtained after rounding up the following upto three significant figures?
34.216, 0.04597, 10.4107
Few figures are expressed in scientific notation. mark the incorrect one.
Which of the following rules regarding the significant figures and calculations involving them is not correct?
Magnitude of $e/m$ for ${O^ - }$
Two students are working on an AP Chemistry lab. Their assignment is to determine experimentally the density of a nonvolatile organic liquid, limestone. The accepted value for the density of limestone is $0.8422\ g/mL$. Each student conducts three separate density determinations, then calculates a mean (average) value for the density and the standard deviation for their three trials.
| Student A | Student B | |
|---|---|---|
| Density #$1$ | $0.8421 g/mL$ | $0.8408 g/mL$ |
| Density #$2$ | $0.8514 g/mL$ | $0.8502 g/mL$ |
| Density #$3$ | $0.8355 g/mL$ | $0.8332 g/mL$ |
| Mean Density | $0.8430 g/mL$ | $0.8414 g/mL$ |
| Standard Deviation | $0.0080$ | $0.0085$ |
The results and calculations for each students are shown in the table below.
Of the four descriptions given below, which BEST interprets the accuracy and precision of Student A and Student B?